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app.py

@@ -79,7 +79,13 @@ async def transport_middleware(request: Request, call_next):
             request_was_gzip=False,
         )
 
+    body_sent = False
+
     async def receive() -> dict[str, Any]:
+        nonlocal body_sent
+        if body_sent:
+            return {"type": "http.request", "body": b"", "more_body": False}
+        body_sent = True
         return {"type": "http.request", "body": body, "more_body": False}
 
     request = Request(request.scope, receive)